This branch clean some hardcoded duplicated values and simplify the super key
code. Also, now Super + Shift != Super for keynum:
Super + keynum -> activate existing instances (ignore Shift modifier in some
weird keyboard layout like French ones :))
Super + Shift + keynum -> open a new instance
It also merge some fixes on alt + F1 from Oliver's that I retouched slightly
It's still hackish on the keynav stuff, some refactoring will be needed.
Also there are some crash fixes, like invalid CompWindow lost in track